305139469 has 8 divisors (see below), whose sum is σ = 309769920. Its totient is φ = 300518400.

The previous prime is 305139467. The next prime is 305139491. The reversal of 305139469 is 964931503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 305139469 - 2¹ = 305139467 is a prime.

It is a super-2 number, since 2×305139469² = 186220191083203922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305139467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89997 + ... + 93325.

It is an arithmetic number, because the mean of its divisors is an integer number (38721240).

Almost surely, 2^305139469 is an apocalyptic number.

It is an amenable number.

305139469 is a deficient number, since it is larger than the sum of its proper divisors (4630451).

305139469 is a wasteful number, since it uses less digits than its factorization.

305139469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 305139469 is about 17468.2417260582. The cubic root of 305139469 is about 673.2341362598.

The spelling of 305139469 in words is "three hundred five million, one hundred thirty-nine thousand, four hundred sixty-nine".